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dev:crosscompiler:backend_arm:code_generator [2019/11/17 19:54] – [Exception Stackframe] ursgraf | dev:crosscompiler:backend_arm:code_generator [2022/12/20 11:34] (current) – [Accessing the Hardware] ursgraf | ||
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===== Exception Stackframe ===== | ===== Exception Stackframe ===== | ||
- | In case of an exception all volatile GPRs together with LR must be saved. | + | In case of an exception all volatile GPRs together with LR must be saved. |
- | EXTR's need no saving, as they are not allowed to be used in exceptions. If an exception method calls a method where EXTR are used (e.g. in an interrupt handler or in a decrementer | + | EXTR's need no saving, as they are not allowed to be used in exceptions. If an exception method calls a method where EXTR are used (e.g. in an interrupt handler or in a timer subclass) you have to use '' |
[{{ : | [{{ : | ||
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===== Accessing the Hardware ===== | ===== Accessing the Hardware ===== | ||
- | Java does not allow direct access and manipulation of absolute memory locations. Nevertheless this is essential for embedded programming. We therefore include this possibility by using a special class //ch.ntb.inf.deep.unsafe.arm.US.java// | + | Java does not allow direct access and manipulation of absolute memory locations. Nevertheless this is essential for embedded programming. We therefore include this possibility by using a special class //org.deepjava.unsafe.arm.US.java// |
===== Low Level Classes ===== | ===== Low Level Classes ===== |